I wouldn't put more than $1000 into it on a retail trade .
You can get proven male cinny breeders for $650, and normal females for $150. Her being gravid, is a perk, if she is really gravid, but you never know how many good eggs, etc. The babies depending on what you get will be around $200 for males, and $250-$300 for females this season.

If you are close to that on value or it the animals are things you want to move out go for it, otherwise I would pass.

Just my thoughts.